ISO 2465:1974
Glycerols for industrial use; Determination of arsenic content; Silver diethyldithiocarbamate photometric method
- Standard No.
- ISO 2465:1974
- Release Date
- 1974
- Published By
- International Organization for Standardization (ISO)
- Status
- 2002-05
- Latest
- ISO 2465:1974
- Scope
- The method is applicable tp products with a content greater than 0, 1 mg/kg. It is applied to a test portion as it is, and to another identical portion with a known quantity of arsenic added. The principle consists in reduction of the arsenic by zinc in a hydrochloric acid medium, with the formation of arsine; absorption of the arsine in a solution of silver diethyldithiocarbamate in pyridine. Photometric measurement of the purplish-red colour produced by the colloidally dispersed silver at the maximum of the absorption curve at a wavelength of about 540 nm.
ISO 2465:1974 history
- 1974 ISO 2465:1974 Glycerols for industrial use; Determination of arsenic content; Silver diethyldithiocarbamate photometric method
